Brisbane Broncos chief executive Bruno Cullen, says team captain Darren Lockyer has a strong case for defamation of character, after it was alleged he was seen on a security video, tackling a nightclub owner.

Brisbane Broncos chief executive Bruno Cullen, says team captain Darren Lockyer has a strong case for defamation of character, after it was alleged he was seen on a security video, tackling a nightclub owner.